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Husqvarna 450 Rancher Idle Problems

Started by RVSardou, February 14, 2017, 07:29:11 PM

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RVSardou

February 14, 2017, 07:29:11 PM
I'm having trouble with my 450 Rancher to idle. 
I've replaced a scored piston.  It has 90 lbs. of compression when it's cold.  How do I tell if I have a bad carburetor,  or a leaky cylinder head gasket.

Thanks,
Rick

dougand3

#1
February 14, 2017, 08:14:10 PM
Welcome. It has 90 PSI after a new piston/ring? That's barely enough to even run. Need to inspect cylinder for scoring.
Husky: 372xt, 272xp, 61, 55 (x3)...Poulan: 315, 4218 (x3), 2375, 2150, 2055, 2000 (x3)...Stihl 011AVT...Homelite XL...Saws come in broken, get fixed or parted, find new homes

Canadiana

#2
February 14, 2017, 08:53:36 PM
90psi is low. Likely that it would run but no power, probably stall in the cut. I would hope for compression more like 160 down to 135 (hopefully higher than 135).
The saw is more fun than the purpose of the wood... the forest is trembling 🌳
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